This [http://www.dsr4.co.uk/|R4 card] is what I've bought to replace our faulty one. I stupidly thought that it was something that would cost the earth and never investigated enough.We got the R4 card as part of a Honk Kong nintendo deal so I thought it would only be available that way again/not legal. It's only because these darn nintendo/kids playing nintendo and breaking them that I have coincidentally found the answer! Seems I'm a bit behind the times..